import java.util.Scanner;

public class Test {
//    class Solution {
//
//        public String toLowerCase(String s) {
//            return s.toLowerCase();
//
//        }
//    }
    String name="happy day xiaobi";

    public void func1 ()throws TextException{
        Scanner sc=new Scanner(System.in);
        String s=sc.next();

            if (s.equals(name)) {
                System.out.println("用户名正确");
            }else {

               throw new TextException();
            }
    }
public static void main(String[] args) {
   Test test=new Test();
   try{
       test.func1();
   }catch (TextException e){
       System.out.println("用户名异常");
   }
}


}


class TextException extends Exception{


}

class Solution {

    public int countSegments(String s) {
        int count=0;
        if(s.equals("")){
            return 0;
        }
        String[] ss=s.split(" ");
        for (int i = 0; i <ss.length ; i++) {
            if(!ss[i].equals("")){
                count++;
            }
        }
        return count;

    }

}
